Allow some more HTTP errors (403 and 404) to be thrown from db hooks
Add a word about abort() usage from db events
Merge branch 'allow-more-http-errors-in-db-event' of github.com:rs/eve into rs-allow-more-http-errors-in-db-event
flake8 and docstrings for #360
Allow HTTP errors to be thrown from db hooks.
Merge branch 'rs-allow-more-http-errors-in-db-event' into develop